Corner protection for expansion joints



June 15 1926. 1,588,718

' A. C. FISCHER CORNER PROTECTION FOR EXPANSION JOINTS Filed Oct. 19, 1925 Patented June 15, 1926.

ALBERT C. FISCHER, OF CHICAGO, ILLINOIS.

CORNER PROTECTION FOR EXPANSION JOINTS.

Application filed October 19, 1925. Serial No. 63,366.

My invention relates to a temporary or permanent protecting means for the corners of expansion joint at time of installation, or a permanent corner protection which re- 5 mains on the corners of the expansion joint after installation.

Expansion joints are usually provided from bituminous material or other suitable mixtures of bituminous and fibrous material which are pliable and easily injured,

with the result that the edges are easily damaged when inserting same in concrete where a vibro-lithic method is employed. The vibro-lithic method is a process which causes considerable tamping on the top of the joint, which readily distorts the upper edge. On the other hand, in warm weather, the distortion of the joint usually'starts at the edges and it is difiicult to keep the square formation without some protecting means.

My invention relates to a flat piece of metal with prongs projecting therefrom, which prongs may be imbedded inthe top or lower edge of the expansion joint, thus furnishing a metal plate for the upper and lower edges. This corner protection may be in the shape of an elongated strip, angular in form, having one face of the plate provided with projecting prongs which may be placed on the top of the expansion joint,

the prongs imbeddin themselves in the plastic material and t e other face extendlng a slight distance alon theside from the upper edge thereof. T is would give a metal facing on a portion of the side and along the upper edge, held in place by the prongs. This is best adapted for rotection of the metal edges up to the time of installation, and it is a very easy matter to lift the metal and thus utilize it for a,

second strip of expansion joint.

Another method of edge protection is that of fabricating this angular strip out of saturated felt, ora capped strip may be made out of saturated felt and laid across either edge of the strip, thus protecting the corners of the joint. The material need not necessarily be confined to metal or saturated felt, but may be any suitable" material such as kraft paper fabric, a strip of ,wood, or any like material. I

Referring to the figures, Figure 1 illustrates an elongated plate havin prongs protruding therefrom adapted to placed over the upper or lower edge of the expansion strip.

Figure 2 illustrates an angular piece of metal in which (a) represents the meta plate and (b) the prongs projecting from one face thereof. The face with the prongs would be placed at the top edge and the other face of the angle would extend partly down. the side thereof.

Figure 2 relates to a channel shaped corner rotection strip in which (a) represents t e top plate, (1)). the, projecting pfotigs and (e) downwardly projecting side P a Figure 3 illustrates an angular cap piece in p ace on expansion joint, inwhich (a) represents the top plate, (a) the side plate of the angle, (6) represents the pron proecting from (02 t e top face of t e angular plate. T e expansion joint (0) is protected at the bottom with a flat strip as shown in Figure (1) in which (a) represents the plate and (b) the prongs protruding therefrom.

Figure 4 illustrates an expansion joint (0) havin its corners rotected by binding a saturatet felt strip {a over the one corner of the expansion strip (0) with an asphaltic binder (d); A similar arrangement 1s pro-- vided at the lower edge of the joint.

Figure 5 illustrates a cross section of this expansion joint having -its corners reinforced.

Figure 6 illustrates a plain upper and lower edging strip protecting the expansion joint (0) with a saturated felt strip (a) adhered by an asphaltic binding material (d).

Figure 7 illustrates a binding of saturated felt (a) over all four corners ,of the expansion joint (0) adhered thereto by a binding material (d).

t is obvious that suitable. material may be found upon the market for preparing the strips in these various shapes or tamping the prongs therefor, cuttin to size, coating with the binder and pIaei the same along the edge of thepjolnt. Inkewise expansion joint material is found'on the mar et fabricated in various we 8, and my invention does not extend to t e material from which the expansion joint is fabricated.

I claim 1. An angular corner reinforcing strip of the joint for expansion joints, one face of which has projecting prongs therefrom, adapted to be embedded in an edge or side thereof, the other plate being free therefrom.

2. A removable corner protection strip for expansion joints, angular in shape, having prongs extending from one face thereof, suitable for embedding in the upper edge of the expansion strip, the other face of the angle extending downwardly from the upper edge thereof.

3. A channel shaped'corner protection strip for expansion joints, having a flat plate top with prongs projecting therefrom adapted to be embedded in the top edge of an expansion strip, having downwardly projecting sides holding the edge of said expansion joint in a straight line.

4. A protecting device for strips of bituminous or. the like expansion joints, comprising a cover, and means on the cover adapted to be embedded in the material of the joint for securing the cover to the joint in protecting relation to the edges thereof.

5. A. protecting device for strips of bituminous or the like expansion joints, comprising a.cover, and means on the cover adapted to be embedded in the material of the joint for detachably securing the cover to the joint in protecting relation to the edges thereof.

6. A protecting device for strips of bituminous or the like expansion joints, comprising a metal plate, and means for securing the plate to the expansion joint in protecting relation to the edges therof, comprising prongs struck from the metal of the plate and adapted to be embedded in the material of the joint.

In testimony whereof I have signed my name to this specification, on this 8th day of October, A. D., 1925.

ALBERT C. FISCHER. 

